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On 30 Apr 2005 at 14:41, Jens Vagelpohl wrote: > On Apr 28, 2005, at 2:48, Jim Adney wrote: > > Also, I have a few sets of Bosch W175T1 spark plugs. > > The W175 heat grade is the correct one for Type 4 engines. I'm > wondering what difference the "T1" makes compared to a "W175T2", which > is the full designation found in my 1971-1974 Without Guesswork booklet > for all Type 4 1700/1800 engines. T1 designates the short thread as used on the type 1 engines. I may have some of the W175T2s if you're interested. These were all good plugs, just not something in common use anymore, and nothing that I would have a use for myself. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~